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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5246–5250

6W, 1kHz linewidth, tunable continuous-wave near-infrared laser

Sheng-wey Chiow, Sven Herrmann, Holger Müller, and Steven Chu  »View Author Affiliations

Optics Express, Vol. 17, Issue 7, pp. 5246-5250 (2009)

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A modified Coherent 899–21 titanium sapphire laser is injection locked to produce 6–6.5W of single-frequency light at 852 nm. After closed-loop amplitude control and frequency stabilization to a high-finesse cavity, it delivers 4–4.5W with < 1kHz linewidth at the output of a single-mode fiber. The laser is tunable from about 700–1000nm; up to 8 W should be possible at 750–810nm.

© 2009 Optical Society of America

OCIS Codes
(140.3520) Lasers and laser optics : Lasers, injection-locked
(140.3590) Lasers and laser optics : Lasers, titanium

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 13, 2009
Revised Manuscript: March 6, 2009
Manuscript Accepted: March 7, 2009
Published: March 18, 2009

Sheng-wey Chiow, Sven Herrmann, Holger Müller, and Steven Chu, "6W, 1 kHz linewidth, tunable continuous-wave near-infrared laser," Opt. Express 17, 5246-5250 (2009)

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  8. 8. We also tested removing the optical diode and the birefringent filter. We found, however, that this makes the laser exceedingly difficult to align and thus we achieve higher power with these elements in place.
  9. 9. CVI part No. PR1-850-90-0537; both the original and a tested 20% output coupler resulted in lower power.
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  11. 11. It is important to limit the PZT volatge to below the maximum of 500V (using Z-diodes, for example).
  12. 12. Shorter than 1m, to avoid stimulated Brillouin scattering.
  13. 13. Increased pump power can increase the total power to a maximum of 7W, but also results in instable operation. Eventually, at more than 22W pump, the output power drops. We attribute this behavior to thermal lensing.
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Fig. 1. Fig. 2.

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